Elizabeth's 66-year reign provides a unique prism through which to examine the defining events of the second half of the 20th century up until the present day.The public's fascination with the royal family has been further fuelled by award-winning drama, The Crown. The third season is due in early 2019 and filming has already begun on the fourth.A selection of stunning photographs and documents, many from the Royal Archives, offer a compelling glimpse into the Windsors' publi